From 3dc71759b7f52e8c263808243ff8f44f54794553 Mon Sep 17 00:00:00 2001
From: korffmo <modest@von-korff.net>
Date: Thu, 25 Jan 2024 08:39:46 +0100
Subject: [PATCH] added hash method

---
 .../research/chem/descriptor/flexophore/PPNode.java  | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/actelion/research/chem/descriptor/flexophore/PPNode.java b/src/main/java/com/actelion/research/chem/descriptor/flexophore/PPNode.java
index d392df9f..4d463fd8 100644
--- a/src/main/java/com/actelion/research/chem/descriptor/flexophore/PPNode.java
+++ b/src/main/java/com/actelion/research/chem/descriptor/flexophore/PPNode.java
@@ -38,6 +38,7 @@
 import com.actelion.research.calc.ArrayUtilsCalc;
 import com.actelion.research.chem.descriptor.flexophore.generator.ConstantsFlexophoreGenerator;
 import com.actelion.research.chem.interactionstatistics.InteractionAtomTypeCalculator;
+import com.actelion.research.util.BurtleHasher;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -214,18 +215,19 @@ public boolean equals(Object o) {
 		PPNode n = (PPNode)o;
 		return equalAtoms(n);
 	}
-	
+
+	@Override
+	public int hashCode() {
+		return BurtleHasher.hashlittle(arrInteractionType, 13);
+	}
+
 	/**
 	 * May be called after finishing adding new interaction types. 
 	 */
 	public void realize(){
-		
 		int sizeBytes = size * getNumBytesEntry();
-		
 		arrInteractionType = ArrayUtilsCalc.resize(arrInteractionType, sizeBytes);
-		
 		sortInteractionTypes();
-
 		calcHasHeteroAtom();
 	}